Since going Primal, much less smell. I've experimented with quite a few things. BS with essential oils, BS with water, essential oils on their own, CO on it's own...at the moment I use CO mixed with BS. Melted and combined then poured into an old glue stick container (thoroughly cleaned!). It works brilliantly and it's so convenient. It's just like using a 'normal' roll-on deodorant. I'm thinking of adding a few oils, for variety.